XML 83 R70.htm IDEA: XBRL DOCUMENT v3.22.1
Quarterly results of operations (unaudited) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2021
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Quarterly results of operations (unaudited) [Abstract]                    
Net sales $ 11,123 $ 10,637 $ 9,325 $ 8,301 $ 7,763 $ 7,300 $ 5,285 $ 10,247 $ 39,386 $ 30,595
Gross profit 4,418 4,317 3,325 3,189 2,372 3,349 2,290 4,918 15,249 12,929
Net (loss) income $ (735) $ 910 $ (2,114) $ (2,206) $ (1,918) $ (867) $ (1,853) $ (992) $ (4,145) $ (5,630)
Net (loss) income per common share [Abstract]                    
Basic (in dollars per share) $ (0.07) $ 0.10 $ (0.24) $ (0.25) $ (0.22) $ (0.11) $ (0.25) $ (0.13) $ (0.45) $ (0.72)
Diluted (in dollars per share) $ (0.07) $ 0.09 $ (0.24) $ (0.25) $ (0.22) $ (0.11) $ (0.25) $ (0.13) $ (0.45) $ (0.72)